Here's something that mainstream Mortal Kombat media DIDN'T tell you:
- chests are RNG within the 450~600 that are present (the items are consistent, but shuffle to and fro)
- most normie chest drop jack shit, except for initially (clearly done to dupe dopes too slow to pick up patterns, into continually throwing more koin at them, and at least until they get bored and move back to Fortnite)
- there are diminishing returns active on all chest loot -- eventually they drop only garbage, and re-rolling them is a waste of koin (once you've opened them all at least once)
- the Shrine is also infected with diminishing returns algorithm -- it won't drop skins after a while (for 100K), and eventually even gear will dry up for near-useless augments (50~75K)
- the Kronika ball seems to drop substantive content each time... BUT, it cannot be fully assessed currently, as it only appears once per Krypt load-up, and seeing as everything else has diminishing returns attached to it, the ball is almost certainly the same
tl;dr -- The entire game literally FORCES players to try and fail at its idiotic "Towers" scam, while dangling real-world money euphemisms ("Krystals") in front of the player (with timed shop content, no less -- FOMO abuse FTW!), that can bypass the grind walls explicitly designed to goad said micro-trannies.
In other words, you will NEVER get all the content in the game (in fact, you'll likely never get the full compliment for the few characters you actually want), unless,
1) you pay for it, or
2) NRS-Warner are threatened with a law suit.
How do I know this? I've hacked the game for over 50 hours, that's how!